/Engine/Source/Runtime/MeshDescription/Public/MeshDescriptionBase.h
Returns reference to an array of triangle IDs connected to this edge
void GetEdgeConnectedTriangles ( [FEdgeID](API\Runtime\MeshDescription\FEdgeID) EdgeID, [TArray](API\Runtime\Core\Containers\TArray)< [FTriangleID](API\Runtime\MeshDescription\FTriangleID) > & OutConnectedTriangleIDs ) const